Designers Studioroom906 have created a set of five porcelain containers that have different shapes but can all contain 150ml.
Each pot was cast from a different type of wood and comes in a box made of that timber.
The imprint of the wood used is visible in each container's surface.
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Here's some text from Studioroom906:
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150ml is a set of five porcelain cylindrical vessels originally cast by five different types of wood; every vessel comes with its own box made out of the same wood used for the original casting.
Each designed to hold a capacity of 150 ml despite their visible variation in scale.
To investigates how the true volume of objects can be disguised by labels or different shapes and sizes, thus affecting the real value of the object that holds the same volume as another with different handles.